If you are looking to install/update Android 8.1 Oreo based LineageOS 15.1 for Xperia Z1 Compact, then it’s now available via an unofficial build. Earlier we had the Lineage OS 14.1 for Xperia Z1 Compact and this time we have the latest LineageOS 15.1.

DISCLAIMER:THIS IS AN INITIAL TEST BUILD WHICH MAY NOT BOOT AT ALL OR MAY HAVE MANY BUGS. FLASH AT YOUR OWN RISK. Installing a custom ROM may require an unlock bootloader on Xperia Z1 Compact, which may VOID your warranty and may delete all your data. Before proceeding further you may consider backup all data on the phone. You are the only person doing changes to your phone; neither the developer nor I can be held responsible for the mistakes done by you.

Follow this if you are flashing LineageOS 15.1 on Xperia Z1 Compact for the first time, or coming from another ROM:

Points to NOTE:

– Try to avoid restoring apps backup using Titanium Backup. It may break things up. – Don’t restore system data using Titanium Backup! It will definitely break the current installation. – It is also discouraged to Restoring Apps + Data using Titanium Backup.

Boot into the TWRP custom Recovery to install this Lineage OS 15.1 for Xperia Z1 Compact.

– Make sure to have a Custom recovery like a TWRP recovery or any other custom recovery. If not then download the TWRP recovery from Downloads link and follow the Custom Recovery Installation Guide (it’s a generic guide which will work for TWRP as well as CWM recovery or any other recovery)

Wipe the data partition (or do a factory reset), Cache partition, Dalvik Cache or ART cache and Format the System partition.

– Here is a guide explaining how to wipe using TWRP recovery.This will delete all your data on your phone. You may consider complete backup of your phone data or take a NANDROID backup of the current ROM

If you don’t have ROOT after upgrading the LineageOS 15.1 on Xperia Z1 Compact, then flash the SuperSU or Magisk or the Lineage SU binary.- Here is a post explaining How to Enable ROOT for LineageOS 15.1 ROM

Once everything is done, reboot and Enjoy the Lineage OS 15.1 for Xperia Z1 Compact.

Complete the initial setup and enjoy Android 8.1 Oreo with Lineage OS 15.1 on Xperia Z1 Compact. After installing Lineage OS 15.1 on Xperia Z1 Compact you may want to enable ROOT access on your phone and here is how you can do that: – LineageOS 15.1 ROOT.